Improper resource shutdown or release in Linux kernel - CVE-2026-72229

Vulnerability identifier: #VU143366

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-72229

CWE-ID: CWE-404

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a memory leak.

The vulnerability exists due to improper resource shutdown in batman-adv mesh interface cleanup when netdev registration is vetoed after creating the untagged VLAN object. A local user can trigger mesh interface registration failure to cause a memory leak.

The issue occurs because the untagged VLAN object is created during the NETDEV_REGISTER notifier path, and .dellink is not called when registration is aborted.

Linux kernel
Ubuntu
linux-nvidia (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-azure (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1112.113, 5.15.0.1112.112
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux (Ubuntu package) - addressed in versions 7.0.0-38.38, 7.0.0-38.38.1, 7.0.0-1008.9, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1015.15
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1015.15
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1017.17

• https://git.kernel.org/stable/c/06ae245168268b705a204f93c318b30107d10e92
• https://git.kernel.org/stable/c/5a82c558098889cc8bfff85cc62f563833205d91
• https://git.kernel.org/stable/c/8669a550c752d86baebc5fdc83b8ff35c4372c0e
• https://git.kernel.org/stable/c/86e32dfb6a6fe29898f4a562b7b6e38e480bba4d
• https://git.kernel.org/stable/c/c945f6007e7851e74706c72f98763023699bcd97
• https://git.kernel.org/stable/c/dbca15fcbeed5276af440a53aed3901590fa7fc9
• https://git.kernel.org/stable/c/f15ca6250591cfe78408114a54eaa8d58da51bfa
• https://git.kernel.org/stable/c/f2423da55976ea249f73029e468aefda4b94acba

• Improper resource shutdown or release in Linux kernel batman-adv
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-oem-7.0